Door lock



FIG. 1 is a front elevational view of a door lock showing my new design, the rear view being plan and unoramented;

FIG. 2 is the front perspective view of FIG. 1;

FIG. 3 is a left side elevation view of FIG. 1, the right side elevation being identical;

FIG. 4 is the top plan view of FIG. 1; and,

FIG. 5 is the bottom view of FIG. 1. 

I claim the ornamental design for the door lock, as shown and described. 